Laying-on and removing device for platen printing presses



LAYING-ON AND REMOVING DEVICE FOR PLA'IENPRINTING PRESSES FiledMay 18,1921 5 sheets-sheet l LAYING-ON AND REMOVING DEVICE FOR PLATEN PRINTINGPRESSES Filed May 18, 1921 5 sheets-sheet 2 Fig.2.

Jnvelfc or MAW Feb. 2Q, 1923.

' G. BORNSCHEIN LAYING-ON AND REMOVING DEVICE FOR PLATEN PRINTINGPRESSES 5 sheets-sheet 5 Filed May 18, 1921 Patented Feb. 2Q, 1923.

GEORG BORNSCHE INQ 0F stems, G eenest;

LAYING-ON ,An'n 'nniviovine'nnvion ro ri'rik'rniiii niif rinriinssn s.

A inieltitnmreaivity is, 192-1. 1 Serial in). 470,532.

T 0 all'whomit may concern) Be it known thatl; Gnone Bon'nsei-inln, acitizen of Germany, residingiatf 16 Moltke: strasse, Bautzen Germanyhave invented certain new and useful Improvements in' ai Laying-011'andlteni'o'ving Device for'Platen l rint ing Presses, of whichthe'follotving ls' aspecifioation. i

The 'nventioii relatesfto a laying onPand removing device for platenprintingpres'ss According to theinvention the grippefon sucker grips thesheet on 'thelaying ontable positively, draws it downwards on to thestir face of the platen, holds it firmly during printing and afterprinting transl'ers' itto' a delivery device, disposedabove the lay'rrrgon table, Which deliversthesheet to a 'reoeiv ing table. The backwardand forward. movement of the grippers is' preferably ef :t'ected bymeans of levers hinged to the platen, these levers being rookedatoo'thed Wheel also provided on the" platen! The toothed Wheelis drivenby a ra'cl; h'iii gedto the machine frame, the toothedWheel'beingadapted to roll on the rack on the movement of the platen. Theconnecting rodbetween the levers and the toothed Wheelis'p' ret'erablyadjustably connected to the levers so that the magnitude of theoscillatory movement of the levers can be adjusted, whereby theoscillatory movement may be made to suit the size 01 thesheets to berinted;

The device has the: advantage that the laying-on and removalo't thesheet is effected entirely automatically. During the Whole operation thesheet to be printed or the printed sheet is under the observation ofthe'layer-on so that it may be observed continuously during the operation aThe device hasin addition the advantage that in consequence-of thevariability of the path of the sheet the machine be runat a higher speedfor smaller sheets byreason of the shorter path. The provision oilaying-on marks on the operative surface oi the platen is unnecessary.

, In the accompanying drawing is illustrated by Way of example aconstructional term of the subject of the invention.

Figure 1 shows a side elevation of the essential portion 01 aplaten'printingpress which is the subject of the invention, the platenbe inp; in the laying-on position. i v

Figure 2 shows a side elevation of the platen printing press With theplaten in t e"- printingposition} the delivery" assion of the platenbeing indicated by chain porting" I me its the grippers-,- theoperatioi'rof t e ripper-M 7 anon cireulai" shaft: Figlirdft shov'vsfthe" drive for this n on circular shaft to a" smaller scale; this being[Figure 0" shows a plan correspofidin'g' to Figure Flg-ure guidedthereinfi to'which the gripper supporting plate is secured: j

thrbugh thtecamand itsassqdiated arts; and

Figu'refS shows an enlarg edsideelevation ofth e platen and thrmin'closed position;

- On the frame 1 of the platen printing pressyisprovided the" latens;Itis operated and "advanced on the fraine by" the driving' pulleythrough the inediihr'i of the connecting r'odlfinth known nan ne'r. The"movement (if-the 'plate'i Q' is controlled by the pin *5; which isr'igidlyse'ciii'ed'to the machine frame 1- and engages" in a slotted guide o", rigidly. corineeted to" the platen: To eaeh side of the platencurved lever 7 is hinged atS. The'twoleve'rs 7 arerigidlv connectedtogether by a shaft" passing across" the Inachiiie. One o i"the-leversisrovide'dwith a slottedplate 91 In this is 'ad ustably' mounted' a bolt.10 thisbolt be locked in the slotted plate' 'bj a Wiligednutfll? To theboltlO 'is'hingedly connectedone end of the eont're'ctilig rod 12, theother end or the rod being pivotally conneeted' to the toothed wheell rThe toothed whe'el13is rotatably mounted onthe platen Q'and' engageswith. a rack 14, Whichis-pivoted to the machine frame at 15'; Y

On'the movementof'the platen the toothed wheel 13 rolls downthel rackl landconse quently reeks the'levers'i' by means of the connecting rodlZ.The rocking movementof thelevers 7 isgreateror smaller, according as'tohetherthebolt lOis'adj'ust-ed in the slotted"plate 9 at a longer orshorter distanc'efrbnithe fulci'hm 8 of the levers 7.

Blocks 17 guided in the operative faceof the platenare linked tothe'ends ofthe levers 7 means of links 16. To these blocks isseeuredaplate lsKFigures 4 ands) passing Gsl'io Sasecti'on oftliecorhe'fof the platen with front view of thef black into the openposition againstthe actioniof i these springs by thenon-circular shaft'21,

(Figure For driving this shaft 2 l there rigidly securedat oneendthereof a lever22 having anumb er of arms. 7 One arm of, this leverengages in a recess 23 of the block 17,, and

projects into a longitudinal slot2l in the block, leading to the recess23.

A groove '25: is formed in the lateral edge ofthe platen, to guide theblock 17 and a blade spring 26 is arranged in the groove so as toproject over the bottom of the groove. On the movement of thehbloclefromthe lower edge of the platen, tothe upper-edge thereof, the downwardlydirected arm ofthe lever22 strikesa-gainst the spring, 26, and is thusturned in a clockwise direction.- The.

arm of the lever which up to the present has been horizontal is thusmoved into an almost vertical positionn The return movement of the leverand the consequent turning of the non-circular shaft 21 in aanti-clockwise direction is eifected by the lever 27. :This

is pivotally'mounted on the pivot 28 (Figures l and 2) and is rigidlyconnected to the lever 29 to which is hinged the connecting rod 30. Theend of this connecting rod carries'a roller 31 which-is guided on a cam32 on the driving pulley 3. As shown in Figure 7,'the crank pin of thedriving pulley- 3, which moves the connecting rod 4 forthe platen2 backand forth, is lengthened and the cam 32 is mounted fast thereon, in sucha way that said cam in no way hinders th movement of the connecting rod4. i

Referringto Figure 8, it will be seen that the grippers 19 doi notstrike against the form when the platen is in itsprinting'position byvirtue'of the fact that these grippers are not as thiclcas thedifferencebetween the height of the type 36 and the height of the closing material37. v In the position of the lever 22 shown in full lines in Figure 1,thefiat surface ofv the shaft 21 is at the side'and also in thechaindotted position shown in Figure 3. I a In this position the gripperisopen and ready toreceive a sheet. I 1

Ifthe'lever 22 is broughtinto the chaindotted positionin Figure 1 bythe-lever 27 the flat surface of the shaft 21 is at the top 1n ahorizontal position.- In this :position the gripper is closed by-the'acti'on;'of-tl1espring 20 and grips the sheets inserted therein. II j The operationof the device is as follows:

The sheet on the laying-ontable, 33 is moved under the gripper 19,; Assoon as the and the sheet device and transferred By reason of themovement ofthe platen,

the toothed wheel 13 rolls down the rack 14. It rocks the levers 7, asabove described so'that the grippers, hinged to these levers, are drawnover the surface of the platen into the press,

'Whentheplaten has almost reached the printing position the rack 14 and.the toothed wheel 13 have assumed such arelative position,-that on thefurther movement of the platen to the printing position no furthermovement of the levers? and the grippers 19 takes place.

After the printing has been completed the platen is swung backintheknown manner, During this return movementof the platen thelevers 7are again swung, backwards and consequently also the grippers, and withthese the sheet, are moved upwards the end of the, sheet' projectingbeyond the upper edge of the platen is thus brought into the deliverydevice 34, provided above the laying-on device, which consists ofrollers and one or more delivery bands. As soonas the platen 2 reachesthe chain-dotted position in Figure 2, the sheetis gripped by thedelivery to the receiving table 35. v

Finally the plat-en 2 again returns to the position illustrated inFigure 1 and during the latter position of this ,movement the grippers19 have again been opened by the spring 26. The device is now ready forthe commencement of anotheroperation.

1. A laying-on and removing-device for platen printing presses thearrangen'ient of grippers adapted to grip the sheet on. the laying-ontable means'for positively moving the grippers with thegripped sheetdownwardly overthe platen so that the upper edge of the sheet coincideswith the upper edge of the platen and to, hold the sheet during theprintingoperation and after the printing operation; ;to transfer themupwardly over the platen,v a delivery device disposed above thelaying-ontable for delivering the sheet from the grippers to the receiving tablesubstantially, as described and represented hereinbefore. g i 2.Alaying-onandremoving device for platen printing presses thearrangement"of grippers adapted to grip the sheet on the platen printing presses,the arrangement of grippers adapted to grip the sheet on the laying-0ntable, levers hinged to the platen,

a toothed Wheel pivoted to the p1a,ten,e rod with one end adjustehlyconnected to the levers and with the other end hinged to the Wheel, arack hinged to the machine frame,

the Wheel gearing with this reek, a delivery device disposed above thelaying-0n table for delivering the sheet from the grippers t0 thereceiving table substantially as described and represented hereinbefore.

In testimony whereof I afiix my signature.

GEORG BORNSCHEIN.

